#include<stdio.h>

int Sum(int start,int end)
{
   int sum = 0;
   int i = start;
   for(i;i<end;i++)
   {
      sum += i;
   }
   return sum;
}

int Add(int x,int y)
{
   return x + y;
}

int Div(int x,int y)
{
   if(y == 0)return -1;
   int q = x / y;
   return q;
}

int main()
{
   printf("process is running\n");

   int start = 1;
   int end = 100;
   int restult = Sum(start,end);
   printf("restult=%d\n",restult);
   Add(start,end);
   Div(10,0);
   printf("process is end\n");
   return 0;
}
